The first official findings from the investigation into the Sierre bus crash have been made public.

The Valais public prosecutor has confirmed that the vehicle was traveling up to 100 kilometers an hour at the time on the crash.

This has been shown through analysis of CCTV footage.

Phone records show that the driver was not talking on his mobile or texting in the leadup to the incident.

Twenty-eight people were killed in the crash including 22 children last March.